<https://sailm8.com/products/harken-22mm-block-removable-sheave#product>
<http://schema.org/description>
"This block is a special version of the 224 22 mm single Micro block with a removable sheave. The sheave rivet has been replaced with a clevis pin and cotter ring. Micro block sheaves run on Delrin® ball bearings for fast trim and release under load."
<https://sailm8.com/products/harken-22mm-block-removable-sheave>